ejb3trail persistence error
mishelangelo Jul 27, 2006 8:37 PMwhenever i try running jsp files that use session beans to access and retrieve persistent (o/r) entities, i get exceptions usu with root cause: NullPointerException on the line where the an entity should have been initialized from a method call to a session bean.
HTTP Status 500 - type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception org.apache.jasper.JasperException: Exception in JSP: /persistence/entitymanager/addfund.jsp:45 42: 43: <% 44: // Collection <Fund> funds = cal.getFunds(); 45: Collection funds = cal.getFunds(); 46: %> 47: 48: There are <b><%=funds.size()%></b> funds in the database.<br/> Stacktrace: org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:504) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) javax.servlet.http.HttpServlet.service(HttpServlet.java:810) org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) root cause java.lang.NullPointerException org.apache.jsp.persistence.entitymanager.addfund_jsp._jspService(addfund_jsp.java:89) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97) javax.servlet.http.HttpServlet.service(HttpServlet.java:810) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) javax.servlet.http.HttpServlet.service(HttpServlet.java:810) org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
I dont see anything wrong with
45: Collection funds = cal.getFunds();
in and of itself.... but what do i know.... :)
Does anyone have any idea why? I'm kinda like a total j2ee newbie